I am trying to create a draft with apps script but I cannot seem to get the compose box to open

[abdullah khan]

I am creating an add-on that helps generate emails. Everything works fine. I'm able to generate content for the email. When I generate a new email it is created in the drafts folder which is expected but I want the newly created email to open up in a new or existing compose box window. I can't seem to get it to work.

​return CardService.newComposeActionResponseBuilder()

        .setGmailDraft(draft)

        .build();

​Above code snippet shows what I am doing to get the compose window to open up. but it's not working.